21 January 2022
The Federal Register, a daily journal of US federal government activity, published a document showing that the US government decided to impose sanctions on 3 Chinese companies on 21 January local time. The sanctions apply to CASC - China Aerospace Science and Technology Corp. First Academy; CASIC - China Aerospace Science and Industry Corp. Fourth Academy; and Poly Technologies Inc. (PolyTech - PTI) and their subsidiaries.
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Link to the original, full comment by the Foreign Ministry Spokesperson Zhao Lijian on 21 January (answer to 6th question (by China News Service))